Fulings should have spawners, and not drop Black Metal.

My Plains are boring. I've killed off all the Fuling villages and tar pits and now aside from the occasional Fulings at night, annoying squitos and the random Lox I haven't tamed, there's nothing to do there but tend to my crops. How can we fix this?

Give us Fuling spawners. They should be located in the Fuling Camps and spawn regular Fulings, Shamans, and Berzerkers. Multiple spawners per camp, and destroyable. Same as the draugr towns in the swamp areas. This would give Plains some much needed replay. And would help people looking for a challenge with some zerker fights without having to constantly look for another new Plains with new villages.

But there's a problem: black metal farming would shoot through the roof. So take away black metal from Fulings. Not entirely, they still collect and horde it, so put it in chests inside their village, preferably in huts so you can't do a drive-by metal grab. Also in the chests at the top of their towers. Maybe 1-2 stacks of ore per village and anywhere from a half to full stack in the towers. Also give zerkers and shamans a small chance to drop 1-2 ore, similar to Oozers dropping iron. Black metal is not overwhelmingly needed (unlike Iron, you only need ~400 black metal, total for weapons/building/upgrades) so removing it from drops and adding it to camps doesn't hurt your progression much at all.

These changes would make clearing Fuling camps a little more challenging and give the option to have the camps respawn a bit when you're looking for a fun battle. They're destroyable so if you want less spawns and more peaceful plains, it's an option. Moving the black metal to the camps and tower chests would still require you to explore and find new camps and towers in order to get the bulk of your black metal, so it doesn't ruin the exploration factor and there's no overhwleming benefit to exploit spawners like people do for greydwarfs and surtlings.